40665853 has 8 divisors (see below), whose sum is σ = 43138872. Its totient is φ = 38201856.

The previous prime is 40665841. The next prime is 40665869. The reversal of 40665853 is 35856604.

It can be written as a sum of positive squares in 4 ways, for example, as 444889 + 40220964 = 667^2 + 6342^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40665853 - 2⁹ = 40665341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40665883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8551 + ... + 12427.

It is an arithmetic number, because the mean of its divisors is an integer number (5392359).

Almost surely, 2^40665853 is an apocalyptic number.

It is an amenable number.

40665853 is a deficient number, since it is larger than the sum of its proper divisors (2473019).

40665853 is a wasteful number, since it uses less digits than its factorization.

40665853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4511.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 40665853 is about 6376.9783596936. The cubic root of 40665853 is about 343.8824103452.

Subtracting from 40665853 its reverse (35856604), we obtain a square (4809249 = 2193²).

The spelling of 40665853 in words is "forty million, six hundred sixty-five thousand, eight hundred fifty-three".